PPC fraud cycle
Probably everybody noticed that PPC business model is extremely vulnerable to click fraud. This follows from simple fact, that faking real person browsing/clicking with automated clickbot is task far from impossible. Having on the other side impressive money making opportunities makes PPC fraud one of the fanciest blackhat online businesses nowadays, but interesting part is that increasing fraud leads to advertisers paying less money for clicks, which the leads to affiliates increase fraud to make at least the same amount of money, which makes advertisers lower bids etc. And because fair competitors cannot compete with this scheme, at the end of the day there are only clickers and advertisers paying $1 for 1000 uniques (and looking for CPA programs) who left. And this was going and going on for years - and PPC still exists. World is full wonders.
